Stop motion for spinning frames and analogous machines



March 29, 1966 E 5 ET AL 3,242,662

STOP MOTION FOR SPINNING FRAMES AND ANALOGOUS MACHINES 2 Sheets-Sheet 1 Filed Sept. 10, 1963 R m w mm W EES: 0 VHw qfi ms I A v um 5v mw m T aim March 29, 1966 T. SHEALY, sR., ET AL 3,242,552

STOP MOTION FOR SPINNING FRAMES AND ANALOGOUS MACHINES Filed Sept. 10, 1963 2 Sheets-Sheet 2 IN VEN TORS THOMAS L. SHEALY, SR. BY COY v. JONES, s2.

5 xmkasziwh ATTOR E V5 United States Patent 3,242,662 STOP MOTION FOR SPINNING FRAMES AND ANALOGOUS MACHINES Thomas L. Shealy, Sn, Spartanburg, and Coy V. Jones,

Sr., Greer, S.C., assignors to Southern Machinery Company, Greer, S.C., a corporation of South Carolina Filed Sept. 10, 1963, Ser. No. 307,948 9 Ciaims. (CI. 57-79) This invention relates to a stop motion for spinning frame-s and analogous machines and, more especially, to a stop motion which is operated by a vertically reciprocable rail which raises and lowers yarn guiding rings relative to rotating bobbins, or raises and lowers rotating bobbins relative to yarn guiding rings, during the winding of the yarn on the bobbins. For purposes of description, it shall be assumed that the yarn guiding rings are carried by the vertically reciprocable rail and that the bobbins, and the spindles on which they are positioned during the winding operation, remain in a fixed position during rotation thereof.

As is well known, the ring rail of a spinning frame is reciprocated in strokes of substantially equal length and is progressively stepped upwardly in forming a filling wound or combination woun package of yarn on each bobbin and thus forms a short tapered portion of yarn on the upper end of each package. In so doing, the ring rail moves to its extreme upper end position or maximum height in the course of movement thereof upon completion of winding the outermost layer of yarn on the bobbins.

Various types of stop motions have been provided heretofore which would initiate stoppage of the spinning frame, such as by breaking the circuit to an electric motor driving the same, upon the ring rail reaching the maximum height position, after which the spinning frame would coast for an indeterminate period of time, depending upon the normal operating speed of the spinning frame, the friction between relatively moving parts of the spinning frame, and other variables. To our knowledge, the prior art types of stop motions were unable to deactivate the power means or drive at an instant during movement of the ring rail which would cause the ring rail to stop at any selected position relative to the bobbins at the termination of the deceleration of the spinning frame.

At the end of the winding cycle, it is very desirable that the ring rail stops at or very near to a predetermined position relative to the bobbins immediately following an upward movement of the ring rail to insure efiicient start-ups in subsequent rewinding of the yarn from the bobbins on spoolers or other winding machines. It has been found that such start-ups are best effected if the yarn is initially withdrawn from the bobbins at a point approximately of an inch above the bottom of the top taper on the usual package formed on a spinning frame, so that the yarn balloons sufficiently at the start-up to avoid initially dragging other adjacent layers of yarn from the bobbins and thereby causing tangling and consequent breakage of the yarn upon starting the rewinding operation.

It is therefore the primary object of this invention to provide a stop motion which overcomes the above and other defects in the prior art types of stop motions and wherein a normally inactive actuator means is engageable by and movable to active position by the ring rail with upward movement thereof to its extreme upper end position or full bobbin position, with means operatively connected to the actuator means and being responsive to movement of said actuator means to the active position and also being responsive to subsequent predetermined movement of the ring rail in the opposite direction and 3 ,242,662 Patented Mar. 29, 1966 out of engagement with the actuator means for inactivating the power means or drive of the spinning frame such that the previously determined extent of subsequent coasting of the spinning frame will result in the ring rail coming to rest at or very close to a predetermined position relative to the bobbins.

It is another object of this invention to provide a stop motion of the character last described in which the means operatively connected to the actuator means includes a tumbler which normally occupies an inactive position outwardly of the path of travel of the ring rail and which is moved to an active position whenever the actuator means is moved to active position so as to be engaged and moved by the ring rail in the course of its downward movement subsequent to the movement of the actuator means to active position so the ring rail imparts movement to the tumbler which, in turn, initiates stoppage of the spinning frame and also returns the actuator means to inactive position.

It is another object of this invention to provide a stop motion of the character last described in which the tumbler is vertically adjustable relative to the actuator so the tumbler may be so positioned relative to the ring rail as to initiate stoppage of the spinning frame at such time in the course of downward movement of the ring rail that the ring rail may move to the bottom of its traversing movement, forming the final layer of yarn on the taper of a filling wound bobbin, and may then coast upwardly a relatively short distance and come to restin or very close to the desired predetermined position spaced substantially from the upper end of the taper at the end of an upward movement thereof.

Some of the objects of the invention having been stated, other objects will appear as the description proceeds, when taken in connection with the accompanying drawings, in which:

FIGURE 1 is a fragmentary elevation of a spinning frame or the like showing the improved stop motion in association therewith, with the actuator and the tumbler occupying cocked or active position;

FIGURE 2 is an enlarged fragmentary and somewhat schematic elevation of the central portion of the stop motion with the cover removed from the housing thereof and showing a suitable electrical circuit in association therewith;

FIGURE 3 is an enlarged elevation of the stop motion shown in the left-hand portion of FIGURE 1, with the cover of the housing thereof removed, showing portions of the ring rail, a corresponding yarn guiding ring and a corresponding bobbin in cross-section adjacent the stop motion, and wherein the movable parts of the stop motion are shown in inactive position in solid lines and in cocked or active position in broken lines;

FIGURE 4 is a perspective view of the stop motion shown in FIGURE 3, removed from the machine, and showing the movable parts thereof occupying active position;

FIGURE 5 is an enlarged fragmentary vertical sectional view taken substantially along line 5-5 in FIG- URE 4; and

FIGURE 6 is a fragmentary elevation, partially in section showing a portion of the switch appearing in the central left-hand portion of FIGURE 3 and the associated switch operating means.

Referring more specifically to the drawings, and to FIGURE 1 in particular, the numeral 10 broadly designates the frame of a spinning frame or analogous machine including an upper substantially horizontally disposed frame member or thread guide rail 11 and a lower substantially horizontally disposed frame member or bolster rail 12. Bolster rail 12 has spindles 13 mounted thereon provided with whorls 14 driven by belts 15 in a wellknown manner. Spindles 13 have bobbins 16 removably mounted thereon to which strands of yarn Y are directed from the usual drafting rolls, not shown, by means of rings 20 and corresponding travelers 21.

The rings 20 are mounted on a vertically reciprocable ring rail 22 and encircle the bobbins 16 in the forming of filling wound or combination wound packages P of yarn on the bobbins 16. The spinning frame is driven by an electric motor 24 which, by means not shown, but being well-known in the art, drives the belts to impart rotation to the bobbins 16 and also imparts vertical reciprocation to the ring rail 22 and rings 20. In the forming of filling wound packages P, the winding cycle is started with the ring rail positioned adjacent the bottoms of the bobbins 16 and the ring rail reciprocates upwardly and downwardly in strokes of substantially equal length throughout the winding operation. The length of each stroke of the ring rail 22 in each direction is substantially equal to the length of taper to be formed on each end of the package P or, at least, on the upper end of the package P, the latter taper being indicated at T in FIGURE 3.

Although the vertical strokes of the ring rail 22 are of substantially uniform length, the ring rail is progressively stepped upwardly throughout the winding cycle so that the uppermost end of the taper T at the upper end of each package P is formed during the last complete upward stroke of the ring rail 22 in which the rings 22 move from a position at the juncture of the taper T with the body of the package P to the upper end of the taper T. Thus, the ring rail 22 reaches its extreme upper end position or full bobbin position upon completing the winding of the last complete upwardly traversed layer of yarn on the bobbins 16.

Heretofore, stop motions have been provided which were actuated upon upward movement of the ring rail 22 to its extreme upper end position, and the machine would then coast or decelerate for an indeterminate period of time so the ring rail would move downwardly a relatively short distance. This short final downward movement of the ring rail 22 is undesirable, because the latter few convolutions of yarn will easily slough off the upper end of the bobbin 16 during the rewinding of the yarn onto another bobbin or into a cheese, because of the latter convolutions of yarn then being disposed above the point at which the yarn initially leaves the bobbin so the first few turns of yarn are unwound upwardly of the bobbin rather than downwardly with respect thereto. Also, a very small balloon is formed of the yarn as it is initially being withdrawn from the bobbin, due to the relatively small diameter of that portion of the taper T from which the yarn is initially withdrawn.

As hertofore stated, the present stop motion permits the stopping of the ring rail in any desired position relative to the bobbin while taking into consideration deceleration of the machine, following initiation of stoppage of the machine or deactivation of the power means of the machine, so that the ring rail may come to rest immediately following an upward movement thereof and at a point closely adjacent the lower end of the upper taper T of the corresponding package P. Thus, with subsequent rewinding of the yarn from the bobbin onto other bobbins or packages, the yarn is Withdrawn from a portion of the corresponding package of relatively large diameter to insure that a large balloon is formed of the yarn at the start-up of the rewinding operation and to insure that the yarn is initially being unwound from the package P in a direction toward the larger end of the taper of the bobbin and away from the direction toward which the yarn is being drawn. The stop motion according to the present invention will now be described.

The improved stop motion comprises an actuator 30 which overlies one end of the ring rail 22 or, if desired, an abutment carried by the ring rail. Actuator 30 is pivotally mounted, as at 31, on a main bracket 32.

Bracket 32 is mounted for vertical adjustment, and inward and outward adjustment with respect to the ring rail 22, on an auxiliary bracket or plate 34 suitably secured to and depending from the frame member 11. Auxiliary bracket 34 is provided with a pair of vertically extending adjustment slots 35 therein (FIGURE 1), and bracket 32 is provided with a pair of horizontal adjustment slots 36 therein. The slots 35 and 36 are penetrated by bolts 37 for adjustably securing bracket 32 to auxiliary bracket 34.

Bracket 32 forms the rear wall of, and is integral with, a substantially rectangular housing 40 which projects forwardly from bracket 32 and whose open front end may be closed by a cover 41 removably secured to housing 40, as by screws 42. For purposes of orientation, it is to be assumed that the side of bracket 32 nearest the ring rail 22 is the inner side thereof and the other side of bracket 32 is the outer side thereof.

A switch operating plunger 45 is mounted for inward and outward sliding movement in and extends between the inner and outer side walls of housing 40. The end of plunger 45 adjacent rail 22 has an annular groove a therein in which a bifurcated yoke 47 is positioned. Bifurcated yoke 47 extends downwardly and then inwardly and is formed integral with the lower toggle arm 50 of a togglejoint construction broadly designated at 51. A reduced upper portion 52 of lower toggle arm 50 is pivotally connected to and straddled by the bifurcated lower portion of an upper toggle arm 53 connected to and preferably formed integral with actuator 30. Thus, actuator 30 and arm 53 collectively form a bell crank. The point at which the upper and lower toggle arms 53, 50 are pivotally interconnected is indicated at b and is located preferably, but not necessarily, above the level of plunger 45.

Bracket 32 has a portion 55 projecting downwardly below housing 40. A base portion 56 is integral with the lower end of portion 55 and extends inwardly for pivotally and yieldably supporting the bifurcated lower end of lower toggle arm 50 of toggle-joint 51. In this instance, the upper surface of base portion 56 has a recess 57 therein into which the lower end portion of lower toggle arm 50 loosely extends. The lower toggle arm 50 is yieldably urged upwardly by and pivotally supported on a resilient block or cushion 60 which extends through a shallow groove 61 formed in the lower end of the lower toggle arm 50.

Resilient block 60 spans the recess 56 and opposed end portions thereof rest upon base portion 56 of bracket 32. As best shown in FIGURES 3 and 5, the recess 57 in base portion 56 has a partition 62 in the central portion thereof which is straddled by the bifurcations on the lower end of lower toggle arm 50 and whose slightly recessed upper surface serves to support the medial portion of cushion 60 and the corresponding portion of the lower end of lower toggle arm 50. Cushion 60 may be made from natural or synthetic rubber or any other suitable resilient material.

The distance between the recessed bottom of lower arm 50 and the pivot point 31 of actuator 30 should be such that cushion 60 is under compression at all times and so the cushion 60 urges the juncture of the arms of the toggle-joint 51 at pivot point b outwardly toward bracket 32 whenever pivot point 12 is positioned outwardly of dead center, and so the pivot point I) is urged inwardly toward ring rail 22 whenever it is inwardly of dead center with respect to the distal ends of arms 50, 53.

In order to limit inward movement of the arms 50, 53 of toggle-joint 51 toward the path of travel of ring rail 22, the portion of plunger 45 within housing 40 and adjacent the inner wall thereof is provided with a collar or abutment thereon which is adapted to engage the inner surface of the inner side wall of housing 40 when pivot point b is located inwardly of dead center with respect to the distal ends of the arms 50, 63. Outward movement of plunger 45 is limited by engagement thereof with the closed end 64 of the cavity in which the outer end of plunger 45 is mounted in the outer wall of housing 40.

The medial portion of plunger 45 within housing 40 has a pair of longitduinally spaced reduced portions 0, d formed thereon which define therebetween a switch operating cam e which may be formed integral with the reduced portions c, d. It is apparent that cam e may be fixed on a reduced portion of plunger 45 to define the two reduced portions 0, d of plunger 45, if desired.

The housing of a normally closed or normally active electrical switch 66 is suitably secured, as by screws 1, to the front face of that portion of bracket 32 defining the rear wall of housing 40. As shown in the electrical circuit of FIGURE 2, switch 66 is normally closed, but it is apparent that the electrical circuit may be so arranged that switch 66 is normally open. Accordingly, the switch 66 shall beconsidered as being normally active with respect to the power means for driving the machine embodied in electric motor 24, for purposes of description.

Switch 66 includes a switch actuating member 3 which is shown in the form of a switch arm in FIGURE 6 and which is normally urged upwardly by a spring 12 (FIG- URE 6). Spring it normally maintains switch 66 in active or closed position. The switch arm g has an upwardly projecting bifurcated portion i therein to which the lower portion of a follower arm 1' is pivotally connected. The upper or free end of follower arm j may have a follower or roller m journaled thereon which is adapted to be engaged by the cam e on plunger 45, as will be presently described.

The lower end of follower arm 1' has a downwardly projecting stop member or abutment n thereon which limits counterclockwise movement of follower arm j, since abutment 11 engages the free end of switch arm g when the follower arm j occupies the substantially upright position in which it is shown in solid lines in FIGURE 3 and in broken lines in FIGURE 6. Follower arm 7' is normally urged in a counterclockwise direction in FIGURE 6 by means of a torsion spring p which extends around the shaft r on which follower arm 1' is pivotally mounted. One end of spring p engages follower arm 1' and the other end of spring 11 engages switch arm g.

The relative positions of switch 66, follower arm j, follower m and the cam e on plunger 45 are such that movement of cam e from the inactive solid-line position of FIGURE 3 to the inward or cocked position of FIG- URE 4 will cause cam e to engage roller m and rock follower arm j relative to switch arm g without operating switch 66. Abutment 65 is so positioned with respect to the inner wall of housing 40 that cam 2 moves inwardly of and out of engagement with follower m by the time plunger 45 and arms 50, 53 are moved to fully cocked position.

Thus, in the course of subsequent outward movement being imparted to plunger 45, cam Q will move into engagement with roller m and, since follower arm j is then in upright position with abutment n positioned against the corresponding end of switch arm g, cam e will cause roller m, follower arm 1', and switch arm g to move downwardly, thus inactivating or opening normally closed switch 66. However, since cam e continues its outward movement (from right to left in FIGURE 3) be yond follower m, it is apparent that switch 66 is only inactivated momentarily by cam e and then returns to its active or closed position preparatiory to a repeat cycle in the operation thereof.

When ring rail 22 reaches its extreme upper end position or full bobbin position in the winding of the second last complete layer of yarn on the tapered portion T of the yarn package P of FIGURE 3, it engages and raises actuator to active position. This moves the pivot point b, at the juncture of the arms 50, 53 of toggle-joint 51, inwardly of the aforementioned dead center position toward the path of travel of ring rail 22 and thus moves cam e inwardly of or to the right of follower arm 1'. The movable parts of the stop motion then occupy cocked po- 6 sition or active position. It should be noted that switch 66 remained active or closed during movement of the movable parts of the stop motion to said active position.

Now, in order to return such movable parts of the stop motion to inactive position and cause cam e to momentarily inactivate or open switch 66 at a predetermined period following movement of actuator 30 from inactive to active position, a tumbler, broadly designated at 70, is adjustably secured to the inner surface of the lower arm 50 of toggle-joint 51, as by means of a bolt 72 which penetrates a vertically or longitudinally extending adjustment slot s (FIGURE 4) formed in lower toggle arm 50. In order that tumbler may extend upwardly beyond the juncture of arms 50, 53 of toggle-joint 51 and will not interfere with the inward and outward movement of these arms 50, 53, tumbler 70 is preferably shaped somewhat in the manner of a boomerang so that it has a projecting medial portion or tip 74 and diverging upper and lower surfaces 75, 76.

The configuration of the lower surface 76 is unimportant, provided that it does not interfere with the vertical reciprocation of the ring rail 22. However, the upper surface of tumbler 70 extends upwardly at an angle and away from the path of travel of ring rail 22 so as to serve as a cam surface and so that a medial portion of cam surface 75 may be engaged by the corresponding end of the ring rail 22 in the course of its downward movement following activation of actuator 30; that is, following the movement of the movable parts of the stop motion to the cocked position shown in broken lines in FIG- URE 3 and in solid lines in FIGURES 1 and 4.

It follows that, by properly adjusting the position of tumbler 70 relative to the lower arm 50 of toggle-joint 51, after ring rail 22 has engaged and moved actuator 30 from the inactive position to the active position, ring rail 22 may engage the surface 75 with subsequent downward movement thereof and cause 'pivot point b to move inwardly beyond dead center with respect to the distal ends of the arms 50, 53 so the cushion 60 will then cause plunger 45 to move inwardly to such extent as to inactivate or open the stop motion switch 66 and then move the cam 2 beyond the follower arm and the follower roller m. The instant at which the stop motion switch 66 is inactivated may thus be accurately determined so that, for example, the subsequent deceleration forces in the moving parts of the machine will cause ring rail 22 to move downwardly to complete the final layer on the taper T of each package P and then move upwardly a relatively short distance and stop at or very close to a predetermined position upon the deceleration forces of the machine being completely dissipated.

There are various types of electrical circuits which may be instrumental in eifecting stoppage of the machine in response to momentary inactivation of switch 66. By way of example, the electrical circuit of FIGURE 1 includes a main electrically operable relay 80 having a group of switches 81-84 which are normally open and which are closed upon energization of the coil of relay 80. The switches 81, 82, 83 are interposed in respective conductors 86, 87, 88 extending from a suitable source of electrical energy, not shown, to the electric motor 24.

Opposed ends of the coil 85 of relay 80 have conductors 93, 94 connected thereto. The other end of conductor 93 is connected to a medial portion of conductor 86 between the source of electrical energy and switch 81. A medial portion of conductor 87 between the source of electrical energy and switch 82 has a conductor connected thereto. The other ends of conductors 94, 95 are connected to corresponding sides of respective manually operable, normally closed and normally open stop and start switches 96, 97, to the other sides of which respective conductors 100, 161 are connected. Conductor 101 is also connected to the same side of switch 96 as that to which conductor 100 is connected.

A conductor 102 extends from one side of switch 84 to a medial portion of conductor 95. The other side of switch 84 has a conductor 103 leading therefrom. The ends of conductors 100, 103 remote from the respective switches 96, 84 are connected to opposed sides of the stop motion switch 66.

Method of operation At the start of a winding cycle, empty bobbins 16 are positioned on spindles 13, the ring rail 22 occupies a lowered position with strands of yarn Y extending from the rings and travelers 20, 21 to the lower ends of the bobbins 16, and the toggle-joint 51 occupies the inactive solid line position shown in FIGURE 3. As heretofore stated, when toggle-joint 51 occupies the inactive position, tumbler 70 is spaced outwardly from the vertical plane of the corresponding end of ring rail 22, actuator 30 occupies the lowered inactive position, cam e is positioned to the left of or outwardly of follower arm 1' and switch 66 occupies active or closed position. The machine is then started by manually closing start switch 97 momentarily to energize the coil 85 of relay 80.

The coil 85 is energized when start switch 97 is closed, because current fiows from lead conductor 87 through conductor 95, switch 97, conductor 101, stop switch 96, conductor 94, coil 85 and conductor 93 to lead conductor 86. Energization of coil 85 moves all the switches 81-84 to closed position, thus completing the circuit to electric motor 24 and starting the spinning frame. Since manually operable start switch 97 is then released, current then flows from lead conductor 87 through conductor 102, relay switch 84, stop motion switch 66, conductor 100, stop switch 96, conductor 94, coil 85 and conductor 93 to lead conductor 86.

When electric motor 24 is energized, the ring rail 22 is reciprocated vertically by the usual builder motion, not shown. In forming a filling wind or combination wind the ring rail 22 moves upwardly and downwardly in strokes of substantially equal length while progressively moving upwardly so that, upon the bobbins 16 being filled with yarn, ring rail 22 reaches its extreme upper end position in the course of an upward stroke thereof. In so doing, ring rail 22 engages and moves actuator 30 upwardly to active position, thus moving the tip 74 of tumbler 70 into the path of travel of ring rail 22. As ring rail 22 subsequently moves downwardly, it moves away from actuator 30 and then moves into engagement with cam surface 75 of tumbler 70.

As heretofore stated, when actuator 30 is moved from inactive position to the active position shown in broken lines in FIGURE 3, plunger 45 moves from left to right in FIGURE 3 into engagement with and then past follower m and follower arm g of switch 66, without opening switch 66. Thus, when the ring rail 22 subsequently moves downwardly out of engagement with actuator 30 and into engagement with cam surface 75 of tumbler 70, the ring rail 22 ultimately moves the juncture of the lower and upper toggle arms 50, 53 outwardly beyond dead center and also moves plunger 45 and its cam e from right to left in FIGURE 3. This momentarily opens or inactivates switch 66, in the manner heretofore described, thus breaking the circuit to the coil 85 of relay 80 and, in turn, breaking the circuit to electric motor 24. The spinning frame will then coast or decelerate for an indeterminate period, depending upon the friction of various relatively movable parts of the spinning frame, whereupon the ring rail 22 will come to rest at a position determined by the instant at which the switch 66 was opened previously by engagement of the ring rail 22 with tumbler 70.

As heretofore stated, it is desirable that tumber 70 is so positioned that, during deceleration of the spinning frame following the opening of switch 66, the ring rail 22 will continue to move downwardly to its lowermost position with the corresponding stroke thereof and will then move upwardly approximately of an inch. Since the deceleration periods of different spinning frames may vary, but the deceleration periods of a given machine is substantially constant, it is apparent that tumbler 76 may be so adjusted as to cause the machine to stop when the ring rail 22 occupies a predetermined position or a position very close to the predetermined position.

When the spinning frame has stopped, the operator usually starts the electric motor 24 and manually lowers the ring rail 22 to its lowermost or doffing position in the course of which a yarn tail is wrapped around each package P from two to six times, whereupon the operator opens the normally closed stop switch 96 to stop the motor 24. Thus, after the bobbins have been dolfed from the spinning frame, the yarn tail on each bobbin may be readily located by the operator when the bobbins or subsequently mounted on the spindles of a spooler or other winding machine, to facilitate tying the yarn tails to the yarn extending from the packages being wound on the winding machine. Upon starting the rewinding operation, the yarn starts leaving the bobbins at the ideal position, previously determined by the position at which the ring rail 22 was stopped prior to the doffing operation, and so that the proper balloon is formed without dragging adjacent layers of yarn from the bobbins, thus avoiding tangling and subsequent breakage of the yarns during at least the start-up of the rewinding operation.

In the drawings and specification there has been set forth a preferred embodiment of the invention and, although specific terms are employed, they are used in a generic and descriptive sense only and not for purposes of limitation, the scope of the invention being defined in the claims.

We claim:

1. In a yarn processing machine having rings for directing yarn to rotating bobbins and a reciprocable rail movable to an extreme end position in one direction only upon said bobbins being filled with yarn, and power means for driving said bobbins and reciprocating said rail; the combination therewith of a stop motion comprising (a) a normally inactive actuator engageable by and movable to active position by said rail with movement thereof in said one direction to said extreme end position,

(b) a tumbler spaced from said actuator and normally occupying an inactive position adjacent and out of the reciprocating path of the rail,

(0) means operatively interconnecting said actuator and said tumbler and being responsive to movement of said actuator to active position for moving said tumbler to active position in the path of and to be engaged by the rail,

(d) means responsive to engagement of said tumbler by said rail to return said tumbler to inactive position, and

(e) means operable in response to the return of said tumbler to inactive position for interrupting said driving means to effect stoppage of the machine.

2. In a yarn processing machine having a reciprocable ring rail and rotating spindles for receiving bobbins thereon, and normally active drive means for rotating said spindles and being operable for reciprocating and progressively stepping said rail toward a full bobbin position in strokes of substantially equal length; the combination of a stop motion comprising (a) a tumbler normally positioned adjacent and to one side of the path of reciprocation of said ring rail,

(b) actuator means spaced above said tumbler and movable fro-m an inactive to an active position by engagement thereof with said ring rail as said rail moves toward said full bobbin position at a predetermined time during reciprocation thereof,

(c) means operatively connecting said tumbler to said actuator means for moving said tumbler into said path with movement of said actuator means to active position whereby said tumbler is engaged by the rail 9 after the same has moved said actuator to active position,

(d) said tumbler being so formed as to be returned to its normal positoin when engaged by said ring rail, and

(e) means operatively associated with said drive means and said tumbler for inactivating said drive means as said tumbler is returned to its normal position.

3. In a y-arn processing machine having rings for directing yarn to rotating bobbins and a reciprocable rail movable -to a full bobbin position in one direction only upon said bobbins being filled with yarn, and power means for driving said bobbins and reciprocating said rail; the combination therewith of a stop motion comprising (a) a normally inactive actuator engageable by and movable to active position by said rail with movement thereof in said one direction to said full bobbin position,

(b) a tumbler spaced from said actuator and normally occupying an inactive position adjacent and out of the reciprocating path of the rail,

(c) means operatively interconnecting said actuator and said tumbler and being responsive to movement of said actuator to active position for moving said tumbler to active position in the path of and to be engaged by the rail, said tumbler being movable back to said inactive position by the rail engaging said tumbler, and

(d) means responsive to movement to said tumbler back to inactive position for interruption the driving means.

4. A structure according to claim 3, in which said interconnecting means (c) comprises (1) a toggle-joint having a pair of substantially alined arms pivotally interconnected at their juncture,

(2) one of said arms being connected to and movable in fixed relation with said actuator,

(3) means securing said tumbler to one of said arms adjacent their juncture, and

(4) means yieldably urging said arms toward each side of dead center with respect to their juncture so that movement of said actuator from active to inactive position causes said tumbler to move to active position, and subsequent movement of said tumbler to inactive position causes said actuator to return to inactive position.

5. In a yarn processing machine having rotatable spindles for receiving bobbins thereon, a reciprocable ring rail movable to a full bobbin position only upon said bobbins being filled with yarn, and electrically operable means for driving said spindles and reciprocating said ring rail; the combination therewith of a stop motion comprising (a) a normally inactive actuator engageable by and movable to active position by said ring rail with movement thereof to said full bobbin position,

(b) a toggle-joint including a pair of pivotally interconnected toggle arms, one of said arms being connected in fixed relation to said actuator, and means pivotally supporting the other of said arms at a point remote from said one arm,

(c) a cam operatively connected to one of said toggle arms and being movable therewith from an inactive to an active :position with corresponding movement of said actuator with said toggle-joint,

(d) a normally active switch for controlling the flow of current from a source to said electrically operable means and being positioned adjacent said cam,

(e) movable means on said switch and normally biased outwardly toward the path of travel of said cam,

(f) follower means pivotally mounted on said movable means (e), normally positioned in the path of said cam and also biased about its pivot point toward the inactive position of said cam such that said cam engages and rocks said follower means with movelo ment of said cam from inactive toward active position,

(g) a tumbler on one of said toggle arms and being movable into the path of said ring rail with movement of said actuator from active to inactive position, said tumbler being movable by said rail to return said actuator and said cam to inactive position, and

(h) means limiting movement of said follower means toward the inactive position of said cam so the cam momentarily engages and moves inwardly said follower means (f) with said movable means (e) to inactivate said switch and interrupt the flow of current to said electrically operable means as said cam returns to inactive position.

6. A structure according to claim 5, including means for adjustably securing said tumbler to the corresponding toggle arm for adjustment toward and away from the other toggle arm.

7. A stop motion for textile machines comprising (a) an actuator movable between active and inactive positions,

(b) a toggle-joint including a pair of pivotally interconnected toggle arms, one of said arms being connected in fixed relation to said actuator, and means pivotally supporting the other of said arms at a point remote from said one arm,

(c) a cam operatively connected to one of said toggle arms and being movable therewith from an inactive to an active position with corresponding movement of said actuator and said toggle arms,

(d) a normally active electrical switch positioned adjacent said cam,

(e) movable actuating means on said switch and normally biased outwardly toward the path of travel of said cam,

(f) follower means pivotally mounted on said movable means (e), normally positioned in the path of said cam and also biased about its pivot point toward the inactive position of said cam such that said cam engages and rocks said follower means with movement of said cam from inactive toward active position,

(g) a tumbler on one of said toggle arms, spaced from said actuator, and being movable from an inactive position to an active position with movement of said actuator from inactive to active position, said tumbler being movable to return said actuator and said cam to inactive position, and

(h) means limiting movement of said follower means toward the inactive position of said cam so the cam momentarily engages and moves inwardly said follower means (f) with said movable means (e) to inactivate said switch as said cam is returned to inactive position.

8. In a spinning frame having a reciprocable ring rail, spindles for receiving bobbins, drive means driving said splndles and reciprocating said rail, and a movable element for stopping said drive means; the combination therewith of a stop motion comprising (a) a support on said frame adjacent said ring rail,

(b) a toggle-joint including a pair of pivotally interconnected toggle arms, means pivotally connecting portions of said arms remote from their pivotally interconnected portions to said support and for biasing the pivotally interconnected portions of said arms toward each side of dead center with respect to the remote portions thereof,

(c) an actuator member fixedly connected to one of said arms and being movable between active and inactive positions in unison with movement of said toggle arms from corresponding sides of dead center toward the opposite side of dead center,

(d) a tumbler member mounted on and movable with the other of said toggle arms,

(e) a plunger connected to and movable With one of said toggle arms and extending outwardly therefrom in a lateral plane with respect to the axis of the pivotally interconnected portions of said toggle arms,

(t) said actuator member being engageable and movable from one position to the other by said ring rail at the end of movement of said rail in one direction, said tumbler member being en-gageable by said ring rail thereafter for moving the tumbler member in the opposite direction from which it was moved when the ring rail moved said actuator member, and

(g) a cam on said plunger movable therewith through the medium of said toggle-joint whenever said members are moved and being so positioned as to engage and move said movable element during movement of said plunger for stopping the spinning frame.

9. A stop motion for engaging and moving an element to stop a textile machine comprising (a) a support,

(b) a toggle-joint including a pair of pivotally interconnected toggle arms, means pivotally connecting portions of said arms remote from their pivotally interconnected portions to said support and for biasing the pivotally interconnected portions of said arms toward each side of dead center with respect to the remote portions of said arms,

() an actuator member fixedly connected to one of said arms and being movable between active and inactive positions in unison With movement of said said members are moved in either direction and being adapted during movement of said plunger to engage and move the element for stopping the machine.

References Cited by the Examiner UNITED STATES PATENTS 1,600,894 9/1926 Laliberte 5779 1,753,247 4/1930 Noah 5779 2,074,059 3/1937 Lewis et al. 57-79 2,503,099 4/1950 Culbreath 57-79 X 2,533,310 12/1950 Carrette -5 57-79 2,559,949 7/1951 Dalton 5779 2,701,946 2/1955 Bridges et al. 5779 2,922,273 1/ 1960 Granberry d 57-79 STANLEY N. GILREATH, Primary Examiner. MERVIN STEIN, Examiner.

I. PETRAKES, Assistant Examiner. 

1. IN A YARN PROCESSING MACHINE HAVING RINGS FOR DIRECTING YARN TO ROTATING BOBBINS AND A RECIPROCABLE RAIL MOVABLE TO AN EXTREME END POSITION IN ONE DIRECTION ONLY UPON SAID BOBBINS BEING FILLED WITH YARN, AND POWER MEANS FOR DRIVING SAID BOBBINS AND RECIPROCATING SAID RAIL; THE COMBINATION THEREWITH OF A STOP MOTION COMPRISING (A) A NORMALLY INACTIVE ACTUATOR ENGAGEABLE BY AND MOVABLE TO ACTIVE POSITION BY SAID RAIL WITH MOVEMENT THEREOF IN SAID ONE DIRECTION TO SAID EXTREME END POSITION, (B) A TUMBLER SPACED FROM SAID ACTUATOR AND NORMALLY OCCUPYING AN INACTIVE POSITION ADJACENT AND OUT OF THE RECIPROCATING PATH OF THE RAIL, 